—Have you seen your aunt lately?

—Yes, in fact I saw her yesterday．I_________ her for several months．

A．haven’t seen

B．didn’t see

C．hadn’t seen

D．don’t see

下列哪项是人类免疫缺陷病毒（HIV）在人体内作用的靶细胞（）

A.CD4T⁺淋巴细胞

B.CD8T⁺淋巴细胞

C.B淋巴细胞

D.NK细胞

E.CTL细胞